UnicodeDecodeError: 'Charmp' codec can't decode byte 0x8f

[Sebastian-Nielsen]

I am getting the following error when trying to run the test.py file.
line 23, in decode return codecs.charmap_decode(input,self.errors,decoding_table)[0] UnicodeDecodeError: 'charmap' codec can't decode byte 0x8f in position 1021: character maps to <undefined>